None of the above
I admit that I haven't tried windows 8, but I have briefly played around with the iPad, and we had purchased one at work to see if it was compatible with any of our systems only to find it out wasn't. I have an android tablet, and while I can do a few things related to work on it, I cannot do some of the most critical tasks. So, as I get ready to leave on a trip an hour from now, I'm lugging my laptop (why did I have to buy such a huge laptop?).
I will keep my android phone close by, though. It's been invaluable this past month while I've been taking emergency trips to unfamiliar places. I can get lost in a 10 x 10 room with one door and a map, so the navigation features of the phone have saved my bacon quite a few times this past month.
